Styrene-Ethylene-Butylene-Styrene Block Copolymer (SEBS YH-502T)

    • Product Name: Styrene-Ethylene-Butylene-Styrene Block Copolymer (SEBS YH-502T)
    • Chemical Name (IUPAC): poly(1-phenylethene-co-1-ethene-co-1-butene)
    • CAS No.: 66070-58-4
    • Chemical Formula: (C8H8·C2H4·C4H8)x
    • Form/Physical State: Pellets
    • Factroy Site: Yunxi District, Yueyang City, Hunan Province
    • Price Inquiry: sales4@ascent-chem.com
    • Manufacturer: Sinopec Hunan Petrochemical Co., Ltd.
    • CONTACT NOW
    Specifications

    HS Code

    788901

    Product Name Styrene-Ethylene-Butylene-Styrene Block Copolymer (SEBS YH-502T)
    Appearance White or light yellow pellets
    Density 0.89 g/cm³
    Melt Flow Index 2-6 g/10min (200°C/5kg)
    Tensile Strength 8 MPa
    Elongation At Break 600%
    Hardness Shore A 70
    Volatile Content <0.5%
    Styrene Content 30%
    Ash Content <0.1%
    Block Ratio Linear
    Main Applications TPE compounds, adhesives, sealants, toys
    Odor Odorless

    As an accredited Styrene-Ethylene-Butylene-Styrene Block Copolymer (SEBS YH-502T) factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.

    Packing & Storage
    Packing SEBS YH-502T is packaged in a 25 kg net weight, moisture-resistant, multi-ply kraft paper bag with clear product labeling.
    Container Loading (20′ FCL) 20′ FCL typically loads 16-17 tons of SEBS YH-502T, packed in 25kg bags with PE liners, on wooden pallets.
    Shipping The Styrene-Ethylene-Butylene-Styrene Block Copolymer (SEBS YH-502T) is securely packed in 25 kg kraft paper bags with inner PE liners to prevent moisture contamination. Palletized and shrink-wrapped for stability, shipments comply with standard chemical transport regulations, ensuring safe and efficient handling during transit and storage.
    Storage SEBS YH-502T should be stored in a cool, dry, and well-ventilated area, away from direct sunlight and sources of heat or ignition. The material must be kept in tightly sealed original packaging to prevent contamination by dust, moisture, or chemicals. Avoid exposure to strong oxidizing agents, and handle with care to prevent physical damage to the packaging.
    Shelf Life SEBS YH-502T has a shelf life of 12 months when stored in a cool, dry place, away from sunlight.
    Application of Styrene-Ethylene-Butylene-Styrene Block Copolymer (SEBS YH-502T)

    Applications of Styrene-Ethylene-Butylene-Styrene Block Copolymer (SEBS YH-502T) in Industrial Manufacturing

    SEBS YH-502T is an advanced thermoplastic elastomer that delivers enhanced flexibility, chemical stability, and processing efficiency. Our manufacturing processes ensure consistent physical properties, enabling downstream partners to optimize formulation and production outcomes in demanding sectors. Below are key application scenarios based on direct industry practices.

    1. Wire and Cable Sheathing Compounds

    This grade of SEBS is widely applied by compounders producing flexible, halogen-free wire and cable jackets. Its thermal resistance and insulating properties support formulations for low-smoke, non-toxic industrial and consumer applications. Customers typically blend it with polypropylene and flame retardant packages to achieve compliant fire performance, mechanical elasticity, and long-term flexibility in automotive, appliance, and building wiring solutions.

    Industry compliance standards

    • UL 62 (Flexible Cord and Fixture Wire)
    • RoHS 2015/863/EU (Restriction of Hazardous Substances)
    • IEC 60332-1-2 (Test for Vertical Flame Propagation)
    • GB/T 19666 (Chinese Safety Standard for Cable Compounds)

    Typical usage ratio

    • Usually 40%–70% SEBS in the final elastomeric blend, adjusted with polypropylene or other polymers to tailor tensile and elongation properties fit for cable category and voltage rating.

    Downstream process integration

    • Melt blending in co-rotating twin-screw extruders, followed by granulation.
    • Cable extrusion lines utilize the compound for single or multi-layer sheathing.
    • Real-time QC tests for tensile strength and insulation resistance.

    Final product types

    • Low-voltage electrical cables
    • Flexible appliance cords
    • Automotive wire harness sheaths
    • Data and telecommunication cable jackets

    2. Medical Device Formulations

    SEBS YH-502T is selected by OEMs and contract manufacturers to produce soft-touch, latex-free components for consumable and reusable medical devices. Its biocompatibility and non-cytotoxic profile support formulations for device parts in direct contact with skin or fluids. Regular use is seen in combining SEBS with medical-grade polypropylene or polyethylene to achieve precise tactile feel and impact resistance while meeting critical extractables and leachables requirements.

    Industry compliance standards

    • USP Class VI (Biocompatibility Testing)
    • ISO 10993-5: Biological evaluation – Cytotoxicity
    • FDA 21 CFR 177.2600 (Rubber Articles Intended for Repeat Use)
    • ISO 13485:2016 (Quality Management for Medical Devices Manufacturing)

    Typical usage ratio

    • Ranges from 25%–60%, determined by required softness and clarity. Higher ratios yield increased elongation and reduced hardness for applications like seals and grips.

    Downstream process integration

    • Compounding with white oils and stabilizers in high-shear mixers.
    • Injection molding or extruding into medical tubing, masks, valves, or syringe plungers.
    • Parts undergo steam sterilization or ethylene oxide sterilization as specified.

    Final product types

    • Medical tubing (e.g., IV, oxygen)
    • Surgical instrument grips
    • Resealable closure parts and seals
    • Plunger tips for syringes

    3. Footwear and Shoe Sole Compounding

    Footwear manufacturers extensively use this polymer as the main elastomeric ingredient in soft, high-resilience shoe soles. Its resistance to cracking, non-stick mold release, and low odor address strict design and production demands for sports and casual footwear. Formulators often blend it with natural or synthetic rubbers and mineral fillers, achieving targeted abrasion resistance, cushioning, and color consistency.

    Industry compliance standards

    • ISO 20871:2018 (Abrasion Resistance for Footwear Outsoles)
    • EN ISO 20344:2021 (Personal Protective Equipment – Footwear Test Methods)
    • California Proposition 65 (Safe Drinking Water and Toxic Enforcement Act)
    • REACH Regulation (EC) No 1907/2006 (SVHC Screening)

    Typical usage ratio

    • Normally 45%–80%, adjusted for softness, rebound, and antiskid performance; other additives include processing oils, UV stabilizers, and pigments.

    Downstream process integration

    • Melt mixing with fillers and coloring masterbatches.
    • Direct injection or compression molding of outsoles and midsoles in multi-cavity molds.
    • Curing and surface texturing steps to enhance antislip features.

    Final product types

    • Sports shoe outsoles
    • Safety footwear midsoles
    • Children’s lightweight sandals
    • Slip-resistant work boots

    4. Adhesive and Sealant Base Resins

    This copolymer serves as a vital base polymer for pressure-sensitive adhesives (PSA) and sealants, where low creep, excellent flexibility, and compatibility with tackifying resins are essential. Formulators achieve high holding power and uniform film formation needed for tapes, protective films, and construction sealants. The raw polymer supports hot-melt processability, clean die cutting, and reduced residue transfer.

    Industry compliance standards

    • ASTM D3330 (Peel Adhesion Testing for PSA Tape)
    • GB/T 35448-2017 (China Standard for Hot-Melt Adhesives)
    • FDA 21 CFR 175.105 (Indirect Food Additives: Adhesives and Components)
    • UNI EN 923 (European Standard – Adhesives Terminology)

    Typical usage ratio

    • Comprises 30%–60% in adhesive formulations, modifiable with tackifier resins (hydrocarbon or rosin ester), stabilizers, and process oils based on adhesion strength and substrate compatibility.

    Downstream process integration

    • Blending with tackifiers and oils in internal batch mixers.
    • Continuous extrusion and drum flaking for PSA hot-melt pellets.
    • Direct coating onto substrates through slot-die or blade systems for tape and label manufacture.

    Final product types

    • Pressure-sensitive adhesive tapes
    • Hot-melt glue sticks
    • Protective films for industrial surfaces
    • Elastic construction sealants

    5. Soft-Touch Automotive Interior Components

    This polymer is utilized by Tier 1 and Tier 2 automotive suppliers in the manufacture of soft-touch panels, airbag covers, and over-molded trim. Its low VOC emission, UV resistance, and resistance to hydrolysis allow compliance with vehicle OEM specifications. Blends with polyolefins and specialty stabilizers are customized to achieve precise flex modulus and surface finish, supporting multi-material assemblies and overmolding applications required throughout automotive cockpits.

    Industry compliance standards

    • VDA 278 (Thermal Desorption Analysis of Organic Emissions in Interior Materials)
    • ISO 3795 (Flammability for Interior Materials)
    • SAE J1863 (Testing Polymeric Interior Components)
    • OEM-specific specifications (VW TL 52361, GM GMW15634, etc.)

    Typical usage ratio

    • Incorporated at 35%–60% depending on target hardness and surface feel; adjustments with PP or mineral fillers for dimensional stability and color depth as per component requirements.

    Downstream process integration

    • In-line compounding with UV stabilizers, pigments, and anti-scratch agents.
    • Injection or extrusion overmolding onto rigid substrates (ABS, PC/ABS blend components).
    • Final in-process checks for roughness, color uniformity, and odor emission based on OEM test plans.

    Final product types

    • Dashboard skins
    • Door panel inserts
    • Gearshift lever assemblies
    • Knee pads and soft steering wheel covers

    6. Thermoplastic Elastomer Compounds for Household Appliances

    Major appliance and white goods manufacturers employ SEBS-based elastomer compounds for gaskets, grips, anti-vibration pads, and flexible housings. The material’s aging stability, color retention, and plasticizer compatibility provide production flexibility for high-throughput automated assembly lines and extended shelf life of finished components. Formulators tailor blends with mineral fillers and olefin copolymers to tune compression set and rebound for each appliance type.

    Industry compliance standards

    • EN 60335-1 (Safety of Household and Similar Electrical Appliances)
    • GB 4806.11-2016 (Food Contact Technical Standard for Rubber Materials)
    • UL 94 HB/V-2 (Flame Rating Test for Plastic Materials)
    • ISO 1817 (Effect of Liquids on Vulcanized Rubber)

    Typical usage ratio

    • Formulators use 30%–65% in blends, adjusting according to durometer, damping, and oil resistance needed for final part geometry and appliance operation environment.

    Downstream process integration

    • Melt blending with anti-aging additives and pigments.
    • Injection or blow molding on automated multicavity tools.
    • Dimensional and material property testing for form consistency and sealing performance during quality inspection.

    Final product types

    • Washer and refrigerator seals
    • Dishwasher and oven handle grips
    • Microwave anti-slip feet
    • Flexible dustproof covers

    Free Quote

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    Certification & Compliance
    More Introduction

    SEBS YH-502T: Reliable Versatility from an Experienced Manufacturer

    Rooted in Polymer Innovation

    After decades working at the bench, tailoring elastomers for manufacturers across the globe, I have seen the challenges that come up with thermoplastic elastomers. SEBS YH-502T reflects that journey. We developed this block copolymer to deliver strong performance where both flexibility and thermal stability matter. Our teams understood how end-users test material limits in the field—stretched, bent, molded, re-melted—and we built SEBS YH-502T to handle those demands.

    From the granular level, SEBS YH-502T combines styrene, ethylene, and butylene blocks to produce a resin that blends the soft feel of rubber with the clean processing profile of plastics. Labs run tests on melt flow, tensile strength, and resilience, but on the plant floor, what matters is how the material responds in real-world applications. This polymer earned its reputation among clients by reducing cycle times in injection molding, and by enabling specialty compounding with both color and filler compatibility.

    Product Model YH-502T: Balancing Strength and Flexibility

    SEBS YH-502T came out of feedback from customers who needed something tough but adaptable. It stands out with a Shore A hardness that walks the line: firm enough for extruded grips and seals, yet soft for overmolds or comfort applications. Engineers turn to YH-502T for wear parts that need a longer service life—a result of dense molecular packing and well-balanced styrene-to-rubber block ratios. Working with this material over many production runs, I have rarely witnessed batch inconsistency. Every shipment meets the strict standards we set, and that reliability saves time for everyone using it downstream.

    Material degradations such as yellowing, embrittlement, or odor are concerns that resurface with some lower grade elastomers. Our strict sourcing and polymerization controls sidestep these pitfalls. We keep inhibitors to a minimum, avoid lubricants that leach, and ensure the resin’s purity stands up under both high-heat processing and post-production aging. Customers who tried off-brand alternatives often switched back to SEBS YH-502T after facing production stoppages or unexpected returns.

    User Experience Across Industries

    We see YH-502T used widely in soft-touch grips, sporting equipment, and medical items—not just because it is easy to process, but because it is engineered for demanding environments. Tool handles require tough skins that do not crack or slip; medical device gaskets need odorless, skin-friendly materials. I have visited assembly lines where workers shape YH-502T into vibration-damping bushings and watched operators favor it for extrusion lines with minimal die buildup.

    Consumer goods manufacturers appreciate the smooth surface YH-502T gives when injection molded. It rejects dust and resists fingerprints. For disposable razors, toothbrush grips, and other personal care items, this makes a world of difference in the hand-feel and visual appeal. Automotive suppliers value how our material withstands under-the-hood heat and oil exposure, without swelling or breaking down.

    Cable and wire producers rely on YH-502T for insulation layers that stay flexible in frigid warehouses. For tools and device makers, the neat edges from molding support precise fittings and tight tolerances. Even for modified compounds—where clients blend pigments, flame retardants, or UV stabilizers—YH-502T remains stable and processes cleanly during both small-batch R&D runs and full-scale commercial lots.

    Processing Confidence for Operators and Engineers

    From our own production layouts to clients’ factories, trouble-free processing counts more than lab numbers. SEBS YH-502T runs smoothly on most single- and twin-screw extruders, with predictable melt viscosity and hassle-free die swell. On days in the plant when other materials struggled with scorch marks or inconsistent pelletizing, YH-502T finished the shift without a hiccup.

    Our collaborators in cable and tubing extrusion mention low die drool and manageable throughput, even at low shear rates. In another case, a molder swapping from a different SEBS discovered they could cut cycle times by 10 percent simply by switching over to YH-502T, thanks to improved flow under typical barrel temperatures. Savings like these come directly from the fine-tuned architecture of this material, not marketing claims.

    Dust-free pellet design helps reduce downtime from hopper jams, and the pellets take up colorants evenly during masterbatch blending. Managers at facilities producing medical device overmolds have commented on how SEBS YH-502T produces crisp, edge-stable parts with minimal flash, while remaining odorless right out of the press. Consistently clean processing also means fewer rejected parts and less scrap—a benefit reflected in bottom lines as well as in operator morale.

    Lasting Value: How YH-502T Is Different from Other SEBS Solutions

    Choosing the right copolymer goes beyond mechanical data or glossy sales sheets. Over years, we’ve collected feedback from compounders, product designers, and maintenance staff who require specific performance. Not all SEBS grades are equal. Some producers boost yield by tweaking the formulation to cut costs, but that can muddy the consistency and cause subtle failures in molded or extruded goods.

    SEBS YH-502T benefits from strict internal controls over styrene and rubber content, leading to repeatable hardness and melt properties in every bag. Smaller batch producers using generic SEBS often report flow marks, color spottyness, or sticky finishes. Our team worked to calibrate the polymerization so YH-502T can handle higher filler loading without sagging. This has been proven in products from tool overmolds to high-demand gaskets. Where lesser products tend to trade off softness for tear strength, YH-502T manages a clean balance of cushioning with reach and flex, all without giving up on durability.

    Some SEBS alternatives bring odors or unwanted extractables due to incomplete hydrogenation or cheap catalysts. In real world use, these off-notes can bleed out during product storage or shelf display, disrupting both users and retailers. A handheld toolkit manufacturer reported losing retail contracts because competitor material yellowed and cracked in warehouse heat. Their switch to SEBS YH-502T eliminated client complaints across a full product season.

    Resolving Industry Challenges through Manufacturing Know-How

    Markets regularly shift. Raw material costs climb, and regulations tighten around extractables and migration in food-contact and skin-contact products. As a manufacturer, we respond by adjusting our workflows to continue meeting these demands. Our engineers collaborate directly with end users and line operators, not just purchasing staff. It’s a difference that shows up when a customer’s project requires a resin that passes updated migration limits, or can handle evolving automotive testing protocols.

    During raw material shortages, we do not swap out key inputs for short-term wins. Instead, our focus remains on security of supply and consistent input quality. When clients faced regulatory changes regarding phthalates or other restricted chemicals, SEBS YH-502T let them adapt formulas without spike in rejects or production delays. By keeping our lines nimble, we help clients launch new products with fewer headaches.

    Supply chain hiccups hit chemical manufacturers too, whether from port congestion or sudden spikes in logistics costs. By holding larger raw material inventories and maintaining strong relationships with upstream suppliers, we sidestep some of these issues. Consistency in resin properties means clients do not have to requalify lots when regulations change or supply chain turbulence strikes. Instead, they can focus on innovation—secure that the elastomer foundation will not shift under their feet.

    Listening to Customers, Adapting to Market Realities

    Every new project comes with unique technical hurdles. One producer needed a grade that would combine with polypropylene while keeping surfaces tack-free. Together, we adjusted foam cell structure during pilot-scale runs until the final parts matched both tactile and mechanical targets. Another molder, producing high-turnover household goods, asked for a copolymer that would remain stable in warehouse humidity. After a review of their process, YH-502T proved superior to a previous import—cutting warranty returns and raising batch yields.

    We have encountered customers who tried lower-cost alternatives, only to return because those grades left sticky residues on their finished parts or failed under hot-cold cycling. SEBS YH-502T resists these pitfalls. Its tight hydrogenation profile and clean base resin remove those failure points. For custom compounders, that opens doors for blending with engineering resins like ABS, EVA, or polyolefins without suffering interface delamination or inconsistent adhesion.

    With more suppliers focusing on recycling and circularity, we’ve worked with recyclers to ensure that off-grade YH-502T blends can re-enter some extrusion cycles. This supports customers aiming to provide take-back programs or closed-loop production—without compromising performance in the next life cycle.

    Regulatory Confidence Backed by Manufacturer Accountability

    SEBS YH-502T meets global requirements for sensitive applications as a direct result of our full control over every stage of production. We keep detailed lot records, and every shipment comes with traceability going back to raw monomers. More importantly, regulatory compliance comes from tested absence of banned substances (like phthalates), and from minimal volatile content.

    Customers in healthcare and childcare sectors rely on our resin because they cannot risk extractables or emissions in final goods. We regularly submit YH-502T for renewed testing against both international and national regulatory lists—rather than relying on old certificates. This practice makes a difference for those shipping to major retailers and for those supplying medical OEMs. I have seen too many projects derailed by late-stage regulatory surprises; we consider it our job not just to supply product, but to give our clients transparency and confidence along the way.

    Whenever major regulatory updates occur—such as new chemical blacklists in the EU, North America, or Asia—our quality team reviews every input and production step against new requirements. We keep lines agile so customers can upgrade their own compliance with minimal drama. That close attention to regulatory details means that our SEBS users can confidently approach new territories or markets, knowing their goods rest on a trustworthy polymer base.

    Environmental Responsibility: Beyond Compliance

    Environmental responsibility is no longer a marketing bullet point. For us, this commitment means using polymerization processes with lower emissions and investing in solvent recovery to cut waste at the source. We have redesigned water handling in our facilities to minimize effluent from finishing steps, and routinely monitor emissions to local air and water. Customers want to see those numbers, and we provide them—because accountability supports their own supply chain responsibility.

    Longevity and processability of SEBS YH-502T also reduce waste at the customer plant. Smooth processing correlates directly with lower reject rates. That effect matters for producers looking to cut both costs and landfill output. In high-volume applications—wire sheathing, appliance handles, or medical parts—those incremental gains matter more than headline-grabbing claims. Preserving flexibility over more use cycles means fewer premature product discards, which benefits the environment further down the chain.

    We continue to work with cross-sector partners on adapting YH-502T for bio-based blends, and on validating recycled content in both packaging and core product. Though SEBS is not bio-derived by nature, persistent technical improvements offer new pathways toward reducing fossil input—without undermining the performance benefits that made it valuable across industries in the first place.

    Building Value for Partners: Lessons from Decades Making SEBS

    From where I stand—in the facilities, walking the factory floor, dealing with compounders, molders, and the people using finished goods—real value comes from trust built over time. SEBS YH-502T reflects years spent not just tweaking recipes, but responding to issues as they emerged in the field. In this business, shortcuts show up quickly through increased warranty claims, lost productivity, or lost customers.

    We stay close to our clients throughout their launch cycles and project updates. Whether someone is scaling up a new tool line, troubleshooting a color mismatch, or looking for ways to meet lower emission targets, we take those calls. Lessons learned through that day-to-day engagement shape ongoing product improvements. In my view, YH-502T sets itself apart by earning a place in the “core materials” list for leading products—not because of aggressive sales, but because it delivers year in and year out.

    Industry demands change fast. What does not change is the importance of stable, clean, high-purity inputs and transparent manufacturing. The quality of SEBS YH-502T comes from meticulous process control, thoughtful formulation, and partnership with customers chasing ever-rising expectations. Those realities shape not just how we make this product, but how we support those putting it to use in the real world.